This is a front-end for the Online Encyclopedia of Integer Sequences, made by Christian Perfect. The idea is to provide OEIS entries in non-ancient HTML, and then to think about how they're presented visually. The source code is on GitHub.
n | a(n) |
---|---|
0 | 2 |
1 | 240 |
2 | 9676800 |
3 | 386266890240000 |
4 | 33674087438261157888000000 |
5 | 11977449554394932435557703221248000000000 |
6 | 29139961073721833036780987632259240162985246720000000000000 |